gochat/frontend/app/javascript/dashboard/helper/APIHelper.js

import Auth from '../api/auth';

const parseErrorCode = error => Promise.reject(error);
const AUTH_HEADERS = ['access-token', 'token-type', 'client', 'expiry', 'uid'];

export default axios => {
  const { apiHost = '' } = window.chatwootConfig || {};
  const wootApi = axios.create({
    baseURL: `${apiHost}/`,
    withCredentials: true,
  });
  const authHeaders = {};
  let refreshRequest;

  wootApi.interceptors.request.use(config => {
    Object.assign(config.headers, authHeaders);
    return config;
  });
  wootApi.interceptors.response.use(
    response => {
      AUTH_HEADERS.forEach(header => {
        if (response.headers?.[header])
          authHeaders[header] = response.headers[header];
      });
      return response;
    },
    async error => {
      const request = error.config;
      if (
        error.response?.status !== 401 ||
        request?._retry ||
        request?._sessionRefresh ||
        !Auth.hasAuthCookie()
      ) {
        return parseErrorCode(error);
      }
      request._retry = true;
      refreshRequest ||= wootApi
        .get('/auth/validate_token', { _sessionRefresh: true })
        .finally(() => {
          refreshRequest = null;
        });
      await refreshRequest;
      return wootApi(request);
    }
  );
  return wootApi;
};